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    <title>Document</title>
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    //let shu =+prompt('请输入第一个数');
    //let shu1 =+prompt('请输入第二个数');
    //shu >shu1 ? alert('zh')
    //let year = +prompt('请输入年份');
      //  year % 4 ===0 && year !==0 || year %400 ===0? alert('$(year)是闰年') : alert('$(year)是平年')
        //let status =year>=18?'':'';
        //console.log(status);
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